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The difference between switching pressure-limiting type SPD and SPD

Feb 18, 2017

The difference between switching pressure-limiting type SPD and SPD:
Switch type SPD gap discharge type device, the lightning energy reducing capacity, used in the line's main role is to discharge lightning energy pressure-limiting type SPD for ZnO varistor, lightning energy reducing capacity is small, but its over-voltage suppression capacity is good, used in the line's main role is to limit the overvoltage. Therefore, the selection at the entrance to a building, such as xingyao SPD switch series to discharge lightning, then, after the level of circuits using B/C series pressure-limiting type SPD limit due to lightning energy level after purging, after the level of the high line voltage. Two SPD needs cooperation, can guarantee the safety devices in the distribution line.